:root {
  --font-sans: "Manrope", system-ui, sans-serif;
  --bg: #08111f;
  --bg-soft: rgba(10, 19, 34, 0.76);
  --panel: rgba(10, 18, 30, 0.78);
  --panel-strong: rgba(12, 22, 38, 0.92);
  --text: #f5f7fb;
  --text-soft: rgba(245, 247, 251, 0.72);
  --line: rgba(255, 255, 255, 0.1);
  --accent: #7cf0cf;
  --accent-2: #7aa7ff;
  --accent-3: #ffc66b;
  --shadow: 0 28px 80px rgba(2, 8, 18, 0.32);
  --ambient-a: rgba(74, 132, 255, 0.28);
  --ambient-b: rgba(30, 213, 171, 0.2);
}

body[data-theme="day"] {
  --bg: #edf3fb;
  --bg-soft: rgba(255, 255, 255, 0.84);
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --text: #172033;
  --text-soft: rgba(23, 32, 51, 0.72);
  --line: rgba(23, 32, 51, 0.12);
  --accent: #1c8d73;
  --accent-2: #4b67df;
  --accent-3: #ff9d4d;
  --shadow: 0 24px 60px rgba(83, 103, 132, 0.18);
  --ambient-a: rgba(75, 103, 223, 0.14);
  --ambient-b: rgba(255, 196, 114, 0.18);
}

body[data-theme="spring"] {
  --bg: #fff7f4;
  --bg-soft: rgba(255, 255, 255, 0.86);
  --panel: rgba(255, 255, 255, 0.92);
  --panel-strong: rgba(255, 250, 250, 0.98);
  --text: #5a4160;
  --text-soft: rgba(90, 65, 96, 0.72);
  --line: rgba(214, 145, 171, 0.2);
  --accent: #ed8baa;
  --accent-2: #8ab9a5;
  --accent-3: #f6c37a;
  --shadow: 0 24px 60px rgba(224, 181, 192, 0.24);
  --ambient-a: rgba(237, 139, 170, 0.18);
  --ambient-b: rgba(138, 185, 165, 0.2);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at 14% 18%, var(--ambient-a), transparent 28%),
    radial-gradient(circle at 88% 10%, var(--ambient-b), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, color-mix(in srgb, var(--bg) 92%, #000 8%) 100%);
  transition: background 0.35s ease, color 0.25s ease;
}

.ambient {
  position: fixed;
  inset: auto;
  width: 30vw;
  height: 30vw;
  border-radius: 999px;
  filter: blur(60px);
  opacity: 0.7;
  pointer-events: none;
}

.ambient-a {
  top: 12%;
  left: -4%;
  background: var(--ambient-a);
}

.ambient-b {
  top: 5%;
  right: -8%;
  background: var(--ambient-b);
}

.page-shell {
  position: relative;
  min-height: 100vh;
  padding: clamp(1rem, 2.5vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.hero,
.panel {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: flex-start;
  padding: clamp(1.2rem, 2vw, 1.8rem);
  border-radius: 1.8rem;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-copy {
  max-width: 52rem;
}

.badge,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.65rem;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1,
.panel h2,
.panel h3 {
  margin: 0;
  line-height: 1.05;
}

.hero h1 {
  font-size: clamp(1.55rem, 2.9vw, 3rem);
  max-width: 12ch;
}

.hero-sub,
.helper,
.panel-note,
.result-summary,
.footer {
  color: var(--text-soft);
}

.hero-sub {
  margin: 0.9rem 0 0;
  max-width: 52ch;
  font-size: 1.02rem;
}

.hero-tools {
  min-width: min(100%, 20rem);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.85rem;
}

.theme-switcher {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.45rem;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.theme-pill,
.action {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.8rem 1.15rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.theme-pill {
  color: var(--text-soft);
  background: transparent;
}

.theme-pill.is-active {
  color: var(--text);
  background: var(--panel-strong);
  border-color: var(--line);
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.action:hover,
.theme-pill:hover {
  transform: translateY(-1px);
}

.action.primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent-2) 42%, var(--accent) 58%));
  color: #09111e;
}

.action.ghost {
  background: var(--panel);
  color: var(--text);
  border-color: var(--line);
}

.content {
  display: grid;
  gap: 1.35rem;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.95fr);
  gap: 1.35rem;
}

.stack {
  display: grid;
  gap: 1.35rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 1.65rem;
  padding: clamp(1.2rem, 2vw, 1.65rem);
  box-shadow: var(--shadow);
}

.panel-accent {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--panel-strong) 86%, var(--accent) 14%), var(--panel));
}

.panel-success {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--panel-strong) 85%, var(--accent-2) 15%), var(--panel));
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.panel-note {
  max-width: 22rem;
  margin: 0;
  text-align: right;
}

.form,
.field,
.recent-list {
  display: grid;
  gap: 1rem;
}

.dropzone {
  position: relative;
  display: grid;
  gap: 0.45rem;
  min-height: 12rem;
  place-content: center;
  padding: 1.5rem;
  text-align: center;
  border-radius: 1.35rem;
  border: 1.5px dashed color-mix(in srgb, var(--accent) 55%, var(--line) 45%);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 9%, transparent 91%), transparent),
    var(--panel-strong);
  cursor: pointer;
  overflow: hidden;
}

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.dropzone strong {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.dropzone span {
  color: var(--text-soft);
}

.field span:first-child {
  font-size: 0.94rem;
  font-weight: 700;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  cursor: pointer;
  color: var(--text);
}

.chip input {
  accent-color: var(--accent);
}

.field-inline {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.metric-card {
  display: grid;
  gap: 0.25rem;
  padding: 1rem 1.05rem;
  border-radius: 1.2rem;
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.metric-label {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.field--actions {
  align-items: flex-start;
}

.helper {
  margin: 0;
  font-size: 0.95rem;
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.checklist li {
  position: relative;
  padding-left: 1.15rem;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
}

.recent-list {
  gap: 0.75rem;
}

.recent-item {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 0.9rem 1rem;
  border-radius: 1rem;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--text);
  text-decoration: none;
}

.recent-item span {
  color: var(--text-soft);
  font-size: 0.9rem;
}

.result-card {
  max-width: 54rem;
}

.result-actions {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin: 1.25rem 0 0.75rem;
}

.footer {
  padding: 0.2rem 0 0.8rem;
  text-align: center;
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    flex-direction: column;
  }

  .hero-tools {
    width: 100%;
    align-items: flex-start;
  }

  .panel-note {
    text-align: left;
  }
}

@media (max-width: 720px) {
  .field-inline {
    grid-template-columns: 1fr;
  }

  .theme-switcher,
  .result-actions {
    width: 100%;
  }

  .theme-pill,
  .action {
    flex: 1 1 auto;
  }

  .panel,
  .hero {
    border-radius: 1.3rem;
  }
}